In Venice he became acquainted with the Greek scholar Muretus, who, in addition to his work in the University of Padua, had for a number of years given editorial assistance in the Greek division of the Aldine Press. In Henry’s diary of his journey, he speaks of being present at a gathering in Rome of _literati_ and poets, who ignorantly condemned Hebrew _ut linguam asperam et horridam_. The young publisher who was well versed in Hebrew, successfully defended the sacred language and resolutely vindicated the cause both of David and his interpreters. A little later, he met, in Florence, Petrus Victorius, one of the most profound Greek scholars at that time in Italy. Henry was able to present to his host a valuable _Codex_ of Anacreon which the Greek professor had not before been acquainted with. In 1550, Henry’s travels extended to England, where he was introduced, as a scholar of note, to King Edward VI. From England, he went to Flanders and became intimate with some of the scholars of Louvain. While in Flanders, he devoted himself to mastering the Spanish language, and he brought back with him from Antwerp to Paris the texts of certain Spanish classics of which he printed French versions. In the twenty-sixth year of his age, he returned to Paris to begin his active business career, for which he had certainly taken pains thoroughly to equip himself. He began his publishing undertakings in 1554, with an edition of _Anacreon_, beautifully printed in quarto. The volume contains, in addition to the Greek text, Latin versions of the _Odes_ prepared by the publisher who himself acted as editor. During 1555, he was again in Italy collecting and collating manuscripts. In 1556, he issued an edition of the _Psalms_ presented in a Latin version which was the combined work of George Buchanan a Scotchman, M. A. Flaminius an Italian, Solomon Macrinus a Frenchman, and Helius Eobanus a German. He was this year busily engaged, in company with other scholars, in editorial work on the _Thesaurus Græcus_. In 1557, he produced editions of _Æschylus, Aristotle, Theophrastus_, and _Athenagoras_. The notes to _Æschylus_ were the work of the scholar Petrus Victorius, with whom Henry had a long-time friendship. In this year was also issued the _Lexicon Ciceronianum Græco-Latinum_, which had been compiled by himself and in which he had brought together whatever passages or material Cicero had utilised from philosophers, historians, poets, or essayists. This work secured for its compiler and publisher high repute as a scholar of wide attainments.